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# Why Variances Add - And Why It Matters

Why is adding variance important? A lesson outline defines a variance theorem and how it affects the data statistics. The instruction shows scholars the importance of considering the variance of data and why it requires independence.

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CCSS:
Adaptable

##### Instructional Ideas

- Use content from the page to create a lesson presentation
- Post the lesson to a class website to use as reference material

##### Classroom Considerations

- Expects a solid understanding of independence

##### Pros

- Provides a proof of the theorem
- Includes connections to help pupils remember the content

##### Cons

- None

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